.\" Copyright (c) 2012 David Xu <davidxu@FreeBSD.org>
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.\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
.\" Portable Operating System Interface (POSIX), The Open Group Base
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.Dd August 21, 2012
.Dt PTHREAD_GETCPUCLOCKID 3
.Os
.Sh NAME
.Nm pthread_getcpuclockid
.Nd access a thread CPU-time clock
.Sh LIBRARY
.Lb libpthread
.Sh SYNOPSIS
.In pthread.h
.In time.h
.Ft int
.Fn pthread_getcpuclockid "pthread_t thread_id" "clockid_t *clock_id"
.Sh DESCRIPTION
The
.Fn pthread_getcpuclockid
returns the clock ID of the CPU-time clock of the thread specified by
.Fa thread_id ,
if the thread described by
.Fa thread_id
exists.
.Sh RETURN VALUES
Upon successful completion,
.Fn pthread_getcpuclockid
returns zero; otherwise, an error number is returned to indicate the
error.
.Sh ERRORS
The
.Fn pthread_getcpuclockid
function will fail if:
.Bl -tag -width Er
.It Bq Er ESRCH
The value specified by
.Fa thread_id
does not refer to an existing thread.
.El
.Sh SEE ALSO
.Xr clock_gettime 2
.Sh STANDARDS
The
.Fn pthread_getcpuclockid
function conforms to
.St -p1003.1-2004 .
.Sh HISTORY
The
.Fn pthread_getcpuclockid
function first appeared in
.Fx 10.0 .
.Sh AUTHORS
.An David Xu Aq Mt davidxu@FreeBSD.org
